vehicle emission

例句：

1. 1. The vehicle emission levels in the city have been significantly reduced.
   该市的车辆排放水平已经显著降低。
2. 2.The government has implemented stricter regulations on vehicle emissions to reduce air pollution.
   政府实施了更严格的车辆排放规定，以减少空气污染。
3. 3.The study found that driving a hybrid vehicle can significantly reduce vehicle emissions compared to traditional gasoline vehicles.
   研究发现，与传统汽油车相比，驾驶混合动力车可以显著减少车辆排放。